Question?

[merxais]

what is .equals("") meaning pls? :eek:

[buntine]

It is a method that tests the represented values of two strings. It will return true if the calling string object represents (or "holds") the same value as the one which is passed to it.

If this case, .equals("") will return true if the calling String object contains an empty string.

Regards.

[merxais]

import java.text.*;

above is apply for?

[Khalid Ali]

if you want to develop in Java, start using Java API (http://java.sun.com/j2se/1.4.2/docs/api/index.html) otherwise you will keep asking such questions.
Here is a lit of classes, interfaces and exceptions for which java.text.*; applies

java.text
Interfaces

AttributedCharacterIterator
CharacterIterator

Classes

Annotation
AttributedCharacterIterator.Attribute
AttributedString
Bidi
BreakIterator
ChoiceFormat
CollationElementIterator
CollationKey
Collator
DateFormat
DateFormat.Field
DateFormatSymbols
DecimalFormat
DecimalFormatSymbols
FieldPosition
Format
Format.Field
MessageFormat
MessageFormat.Field
NumberFormat
NumberFormat.Field
ParsePosition
RuleBasedCollator
SimpleDateFormat
StringCharacterIterator

Exceptions
ParseException

and one more important advice, never use wildcard imports such as
java.text.*;
always use explicit imprts for a particular class.

such as
import java.text.DecimalFormat;

[merxais]

i write the following coding but if i want to make it into database... what suppose to do?

import javax.swing.*;
import java.text.*;

public class Project
{
public static void main(String args[]) //Main

{
String inputName,inputNameU,inputCont,inputIC,outputName="",outputNameP="",inputReg; //Variable declarations
String studentNameU="", inputMore;
int inputStudent,inputCourse, loop;
double student,fee=0.0,totalFee=0.0,feeTotal=0;

DecimalFormat twoDecimals = new DecimalFormat("0.00");//Format used to produce output with 2 decimal points

do // do...while loop used to get input from user
{
inputName=JOptionPane.showInputDialog("Welcome to Dota Tuition Center.\nPlease proceed to view our courses.\n\nPlease enter name for enrol: ");

if (inputName==null) //check input validity
{
JOptionPane.showMessageDialog(null,"Thank you. Program will now exit.", "Program Exit", JOptionPane.WARNING_MESSAGE);
System.exit(0);
}
else if (inputName.equals(""))
JOptionPane.showMessageDialog(null,"Please enter your name. Thank you.","ERROR", JOptionPane.ERROR_MESSAGE);


}while(inputName.equals(""));//end of do...while loop

inputNameU=inputName.toUpperCase();//Changes the input to UpperCase letters

//More user inputs:
inputCont=JOptionPane.showInputDialog("Please enter your contact number: ");
inputIC=JOptionPane.showInputDialog("Please enter your I.C. number: ");
inputStudent=Integer.parseInt(JOptionPane.showInputDialog("How many people to enrol?"));


for (loop = 2 ; loop <= inputStudent; loop++)//for loop to collect Student's names
{
inputMore = JOptionPane.showInputDialog("Registration name no."+loop);
inputMore = inputMore.toUpperCase();
studentNameU += inputMore +"\n";

}//end of Student for loop


do //do...while loop to get user's course
{
inputCourse=Integer.parseInt(JOptionPane.showInputDialog(null,"Please select course:\n1. English\n2. Mandarin\n3. Malay\n4. Mathematics\n5. Science")); //User input course selection

switch (inputCourse)//to get the required information for processing
{
case 1:
outputName+="English";
student=(inputStudent*500.00);
fee=student;
outputNameP+="15 weeks";
break;

case 2:
outputName+="Mandarin";
student=(inputStudent*888.88);
fee=student;
outputNameP+="14 weeks";
break;

case 3:
outputName+="Malay";
student=(inputStudent*400.00);
fee=student;
outputNameP+="12 weeks";
break;

case 4:
outputName+="Mathematics";
student=(inputStudent*999.99);
fee=student;
outputNameP+="14 weeks";
break;

case 5:
outputName+="Science";
student=(inputStudent*1200.00);
fee=student;
outputNameP+="14 weeks";
break;

default:
JOptionPane.showMessageDialog(null,"Error. Please select from list only. Thank you.");
}

}while(inputCourse>5 || inputCourse<1);//end of do...while loop

feeTotal = countFee(fee);//calling the fee calculation Method

totalFee=fee+feeTotal;//calculates the total tuition fees for the course


inputReg=JOptionPane.showInputDialog("Enrolment Date: (dd/mm/yyyy)");//asks user to input the enrolment date

//prints the output/information:
JOptionPane.showMessageDialog(null,"Course: "+outputName+"\nCourse Duration: "+outputNameP+"\nEnrolment Date: "+inputReg+"\n\nStudent(s) issued to:\n"+inputNameU+
"\n"+studentNameU + "\n" +"\nStudent Information:\n"+"Student Name: "+inputNameU+"\nContact number: "+inputCont+ "\nI.C. no: "+inputIC+"\n\nTotal Tuition Fees: RM"+twoDecimals.format(fee)+"\nAdditional Fee: RM "+twoDecimals.format(feeTotal)+
"\nTOTAL Tuition Fees: RM "+twoDecimals.format(totalFee)+"\n\nClick OK to confirm registration.");

JOptionPane.showMessageDialog(null,"Your request has been sent. We will call you regarding your payment.\nThank you for choosing Dota Tuition Center.\n\nFor more information or enquiries, please call 03-32918888.");


System.exit(0);
}

//the fee calculation Method:
public static double countFee(double price)
{
double labF,libraryF,insuranceF; //variable declaration

labF = 100; // lab fee
libraryF = 50; //library fee
insuranceF = 0.05; //insurance fee

return (labF)+(libraryF)+(price*insuranceF); //returns the total fee amount
}
}//END OF PROGRAM